Delete Signatures of the certain types Leave feedback
GroupDocs.Signature provides overloaded Delete method that accepts list of the SignatureType enumeration values. Please be aware that this method modifies the same document that was passed to constructor of the Signature class.
Here are the steps to delete signature by certain types from the document with GroupDocs.Signature:
- Create new instance of Signature class and pass source document path or its stream as a constructor parameter;
- Call Signature object Delete method and pass list of the required SignatureType enumerations to it.
This example shows how to delete various signatures types from the document at once.
using (Signature signature = new Signature("signed.pdf"))
{
// compose the list of signature types to delete
var signedTypes = new List<SignatureType>
{
SignatureType.Text,
SignatureType.Image,
SignatureType.Barcode,
SignatureType.QrCode,
SignatureType.Digital
};
// deleting QR-Code signatures from the document by signature types
DeleteResult result = signature.Delete(signedTypes);
if (result.Succeeded.Count > 0)
{
Console.WriteLine("Following signatures were removed:");
int number = 1;
foreach (BaseSignature temp in result.Succeeded)
{
Console.WriteLine($"Signature #{number++}: Type: {temp.SignatureType} Id:{temp.SignatureId}. Created: {temp.CreatedOn.ToShortDateString()}");
}
}
else
{
Helper.WriteError("No one signature was deleted.");
}
}
You may easily run the code above and see the feature in action in our GitHub examples:
- GroupDocs.Signature for .NET examples, plugins, and showcase
- GroupDocs.Signature for Java examples, plugins, and showcase
- Document Signature for .NET MVC UI Example
- Document Signature for .NET App WebForms UI Example
- Document Signature for Java App Dropwizard UI Example
- Document Signature for Java Spring UI Example
Along with the full-featured .NET library, we provide simple but powerful free online apps.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.
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